Mounting of twin tired wheels



oct.. 22, 1935. |=l M BOURBON l 2,018,598 I MOUNTINGOF TWIN TIRED WHEELS Filed My 9, i935 nDerlOl.' Bfzerre Warm? owfdow Patented1 Oct. 22, 1935 PAT ENT,J orfrlcr.'

2,018,598 MOUNTING or TWIN man WHEELS Pierre Marcel Bourdon, Paris, France, assignor to Michelin et Cie., Clermont-Ferrand, France, a

corporation of France Api'ation May 9, 1933, serial No. 670,171

In France March 22, 1932 i 1 Claim.

' 'I'he present invention relates to improvements in the mounting of twin tir'ed wheels, and is an improvement over my prior similarly entitled application filed in the United States Patent Oilice February 25, 1933, Serial No. 658,627 which matured as Patent No. 1,996,140, April 2, 1935.

In common with my prior application above referred to, the present invention has for an object to provide a yieldable mounting whereby the two tires may conform to the road and equally bear the load.

The invention further aims to balance the weight supported bythe two tires in a manner to make uniform the wear of the tires, particularly pneumatic tires.

A further object of the invention is to provide means to exclude dust, dirt and other foreign matter from the interior partsofv the wheeled mounting, and at the same time not to interfere with the flexible action of such mounting.

With the foregoing and other objects in view, the invention will be more fully described hereinafter and will be more particularly pointed out in the claim appended hereto.

In the drawing, wherein like symbols refer to lviike or corresponding parts throughout the several ews.

Figure 1 is a vertical section taken through an v axle, brake drum and twin tired wheel structure according to the present invention; 'and Figure 2 is a fragmentary vertical cross-section showing a modified form of the invention.

Referring more particularly to the drawing, at 62 is shown an annular outer part. to which the two rims are rigidly secured and which forms with'the rims the rim assembly. Such rim assembly is-adaptedV vto oscillate laterally on the rubber sleeves 63, whereby to permit the twin tires to conform to camber, curvature and irregularities in the road surface. The hub flange is indicated at 64 and is connected with the hub 66. The hub vflange may also carry the brake drum 66. The axle is 4indicated at 61.

The hub ange 64 extends outwardly from the hub in proximity to the inner end portions of the rubber sleeves 63 and to the annular .member 62 and it is provided with la face or wear plate 66 acting as an abutment `to limit the rocking movement of the ring or annular member 62 in a trans-f verse direction at the inner side of such 'annular member. A removable cap 69 is ailixed outwardly on the hub andover the bolts f 1li which pass through the rubber sleeves 63 and'through the hub flange. Such cap plate 69 has facings or a wear vplate 1| presented toward the outer ends of the i rubber sleeves 63 and toward the annular member 62 whereby to be engaged by said annular member when the rim assembly is tilted to a predetermined degree, thus acting to limit the rim assembly in its transverse oscillating movement.

At 12 and 13 are shown more or less flexible strips bridged across the gaps between the annular member 62 and thewear or abutment meme bers 68 and 1i, in order to prevent the entrance 1- of dust, dirt, grit, oil and other foreign matter 10 which would tend to fill up thegaps at the sides of the annular member 62, thus unduly restricting the lateral swinging motion ofthe rim assembly and-also creating friction and undue wear between the parts. f

In Fig. 2 a very similar arrangement is shown with a different type of hub 14 and hub flange 15 which is independent of the brake drum. A somewhat diilerent type of cap or enclosing plate 16 is shownl as being mounted over the hub and havzo ing an appropriate securing means 11 for permitting of the removal of the plate 16, which plate 16 isI presented opposite to the hub flange 15 to receive the bolts 18 which pass through the various rubber sleeves 19. The wear plates or abut- 2 5 ments are shown at 60 and 16| and the dust excluding strips at 82 and.

It is obvious that various changes and modications may be made in the details of construction .and design of the above specically de- 60 scribed embodiment of this invention without departing from the spirit thereof, such changes and modifications being restricted onlyV by the scope of the following claim.

Whatvis claimed is:

In a twin tired wheel, the combination of a hub, a hub ange having an abutment face. a wear plate on said abutment face, a cap also having an abutment face in spaced relation to the hub iiange, said cap being removably fitted over 40 the outer portion of the hub, a wear plate for the abutment face of said cap, bolts extending across from the hub flange to the cap, rubber sleeves tted -over said bolts,l a rim assembly including a pair of road engaging tires and having circular 45 openings receiving said rubber sleeves to support the rim assembly thereon, sai'dfrim assembly and rubber sleeves at the parts thereof between said wear plates being spaced at both ends from the wear plates to permit transverse flexing move- 60 ment, and flexible strips extending from the rim assembly respectively to said hub ilange and cap for excluding foreign matter from the joint 'adjacent said wear plates.

, i' PIERRE MARCEL BOURDON. 

